different between macaw vs hummingbird

English

From Portuguese macao, from Tupian.

macaw (plural macaws)

Any of various parrots of the genera Ara, Anodorhynchus, Cyanopsitta, Orthopsittaca, Primolius and Diopsittaca of Central and South America, including the largest parrots and characterized by long sabre-shaped tails, curved powerful bills, and usually brilliant plumage.

From humming (noun) +? bird, in reference to the humming sound made by the rapidly moving wings.

hummingbird (plural hummingbirds)

Any of various small American birds in the family Trochilidae that have the ability to hover.
- 1857 Thoreau, Henry David, journal entry, May 29, 1857. From Thoreau on Birds: notes on New England birds from the Journals of Henry David Thoreau, Boston: Beacon Press, 1993, p238. (Originally published as the anthology Thoreau's bird-lore, Boston: Houghton Mifflin, 1910, edited by Francis H. Allen.)
  Soon I hear the low all-pervading hum of an approaching hummingbird circling above the rock, [...]

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